I - Echo Nolan - have been working on a BitTorrent client library. It uses fun things like iteratees and STM. If anyone is interested in hearing about/working on it, I'm more than happy to give the guided tour.

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4 Crypto 5.0 notes

See the patch-tag.com crypto repository files Data/Digest.hs and Data/Cipher.hs for proposed Digest and Cipher typeclasses.

This would allow digests to be called with a simple "hash" function so long as they have an instance: